on x86_64:

ERROR: "labpc_1200_is_unipolar" [drivers/staging/comedi/drivers/ni_labpc_cs.ko] undefined!
ERROR: "labpc_1200_ai_gain_bits" [drivers/staging/comedi/drivers/ni_labpc_cs.ko] undefined!
ERROR: "range_labpc_1200_ai" [drivers/staging/comedi/drivers/ni_labpc_cs.ko] undefined!
ERROR: "labpc_common_detach" [drivers/staging/comedi/drivers/ni_labpc_cs.ko] undefined!
ERROR: "labpc_common_attach" [drivers/staging/comedi/drivers/ni_labpc_cs.ko] undefined!

Full kernel (rand)config is attached.

---
~Randy